It\'s a dynamic DNS service. It enables you to run your own server (FTP, WWW, whatever) without having to purchase any form of hosting, domain or static address (as is normally required so that the clients can find your server). Think of it as your physical (postage) address: if you\'re on a dialup connection, it\'ll usually change each time you log on, as if you were in a caravan. If you now had someone track your movement and teleport your visitors to the location you currently are, you\'d have \"no-address\", the RL equivalent of \"no-ip\".
Of course, when you\'re not online, your server isn\'t reachable, just like when you\'re on the road in the caravan case.
This option, however, is only reasonable if you have a broadband connection, because the clients will be limited to what your connection can upload. I\'d hate it if ppl. would host 500 Kb files on 28.8 connections... :] Also, you\'d better not have a time / volume based contract.
